蟒子，杀时间延迟后处理 [英] Python subprocess, kill process after timed delay

问题描述

我与Python和树莓派工作第一次（这是一个丕2），并试图控制定时的命令集。我已经得到了大部分想出除了尽头，在这里我要杀死所有进程。

I'm working with Python and Raspberry Pi for the first time (it's a Pi 2) and trying to trigger a timed set of commands. I've got most of it figured out except the very end, where I want to kill all processes.

的逻辑如下：

- 触发的音频文件（.wav）所谓的倒计时

-- Trigger an audio file (.wav) called "countdown"

- 引发另一音频文件（.wav）称为迪克西

-- Trigger another audio file (.wav) called "dixie"

- 虽然迪克西正在播放一个触发的wget命令触发我的相机上的照片

-- While dixie is playing trigger a wget command to trigger a photo on my camera

- 继续玩迪克西，直到previous wget的完成执行

-- Keep playing "dixie" until the previous wget finishes executing

- 当wget的完成执行，停止播放迪克西

-- When wget finishes executing, stop playing "dixie"

- 触发最后的音频文件（.wav）所谓的掌声

-- Trigger final audio file (.wav) called "applause"

- 停止所有音频

从本质上讲，wget的是最重要的，音频文件播放只是，而我的相机拍摄的照片来创作音乐。当wget的完成和掌声结束，我要杀死所有的音频，但对于迪克西的subprocess.Popen命令继续播放（这是约40秒之久）。我怎么能在最后杀死这个过程吗？

Essentially, the wget is the important one, the audio files playing are just to create music while my camera takes a photo. When the wget has finished, and the applause finishes, I want to kill all the audio, but the subprocess.Popen command for "dixie" continues to play (it's about 40 seconds long). How can I kill this process at the end?

下面是我的code迄今：

Here is my code so far:

import os
import time
import subprocess

subprocess.call(["aplay countdown.wav"], shell=True)
subprocess.Popen(["aplay dixie.wav"], shell=True)
subprocess.call(["wget 'http://10.5.5.9/camera/SH?t=12345678&p=%01' -O-"], shell=True)
time.sleep(5)
subprocess.call(["aplay applause.wav"], shell=True)
subprocess.Popen.kill(["aplay dixie.wav"], shell=True)

我要杀人迪克西曾经叫好播放完毕。

I want to kill "dixie" once "applause" has finished playing.

我的code产生的错误：

My code yields the error:

"unbound method kill() must be called with Popen instance as first
argument (got list instance instead)"

任何建议了吗？

推荐答案

我建议这样做的：

proc = subprocess.Popen(["aplay dixie.wav"], shell=True)

# do something 

proc.terminate()

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